Film cutting and joining device



June 5, 1928. 1,672,542

. I H. ROHRDANZ FILM CUTTING AND JOINING DEVICE Filed Aug. 11, 1925 2Sheets-Sheet 1 /z' IN V EN TOR.

/ "/0 ATTORNEY June 5, 1928.

H. ROHRDANZ FILM CUTTING AND JOINING DEVICE 2 Sheets-Sheet 2 Filed Aug,-ll, i925 2 l l I "s y-" JNVENTOR flrolafioirdanz: BY

/' ATTORNEY v -Patented June 5,1928.

PATENT OFFICE.

EKROLD ROHBDANZ, OI IKQLEWOOD, CALIFORNIA.

- FILM comma AND .romme nnvrcn Application filed August 11, 1925. SerialNo. 49,656.

v This invention relates to means for trimming and joining strips offilm eitherfor originally assemblingfilm or forsubsequently patchin thesame.

'5 An ject of the invention is to provide a film-sp icing device whichwill insure er- -fect spacing of the film in'two joined m s'ectionsiwherebythe film may be, run through a projecting machine withoutrequiring adjustment after the joint passes through.

Another object is to rovide in such a device means which will eceive andretain two film-ends whereby the same may be presented in properlyspaced'and aligned position for trimming and which will enable sald endstobe separated for abrasion of their surfaces and application of cementthereto, and then to be moved readily to position where they willautomatically assume their original relation of perfect spacing andalignment for performance of the joining operation.

, 'A further object is to provide a device .line 6-6 of Fig. 5.

of the above character including a manually operable means for efi'ectinabrasion of the portion of av film section'to e overlappel and adheredto another film section.

The invention resides in the novel arrangement and combination of artsand features of construction disclosed in the accompany-. in dsawings,described hereinafter and pointed out in the appended claims, it beingunderstood that the invention is limited only as defined'by said claims.

' tively movable. holders adapted to receive -film ends, said'holdershaving guiding .and positioning means whereby the images on the film maybe properly spaced and aligned,

40 each holder including means for engaging and holding the film ends inposition. One

of said holders preferably is stationary. The other holder, which ismovable in the direction 'of the length of the film and alsoperpendicularly thereof, initially is spaced from the stationary holderfor receivmg the film; and is adapted then to be lifted and moved in thedirection of the length of the film toward the stationary holder whenceit may be i swung into guided position alon ide said stationaryholderfor trimming o the waste ends of the ..film sections. The vmovableholder may then-be withdrawn for abrading the overlapped ends of filmand for appli-.

cation of cement thereto, whereupon it will I be returned to guidedposition alongside the Briefly, the invention comprises two rel'a-,

disposed a stationary holder for the joining operation;

means being provided on the stationary holder operable to efiectabrasion of the film section retained therein.

In the drawings wherein certain embodiments of the invention aredisclosed by way of illustration:

Fig. 1 is a perspective view of the film splicer showing the hinged filmengaging leaves or plates in elevated position ready for reception offilm ends on the lower plates of the holders I Fig. 2 is a plan viewshowing the leaves lowered into operative position;

Fi 3 is a cross sectional detail taken on the line 3 -3 of Figure 2;

Fi 4 is a plan view showing the parts as positioned in effectingabrasion of one side of the film section;

Fig. 5 is a view in section and elevation as seen on the line 55 of Fig.4 illustrating the abrading device;

Fig. 6 is a horizontal section as seenon the as shown, a stationaryholder is provided which comprises a plate 14 secured to the table,13,as by means of screws 15. This plate is equipped at one sidewith a pairof pins or projections 16 adapted to enter the apertures providedadjacent the edges of motion picture film, while at the opposite side ofsaid plate 14 a second pair of pins 17 is provided which are'so spacedas to. engage the edges of a strip of film such as indicated at F. Forthe'purpos e of retaining the strip F of film upon the plate 14 a hingedplate or leaf 18 is rovided having hingmg ears 19 libut a rod or prntle20, said cars 19 being positioned on the'rod 20 by reason of engagementwith suitable positioning means, such as ears 21 which may be carried onthe stationary plate 14. .When in inopthereby permitting firm engagementof the is provide film by said leaf.

At the posite end of the base a holder which is movable toward and fromthe stationary holder, said movable holder comprising a plate 25 havinga pair of projecting pins 26 adapted to'enter the apertures at the sidesof the strip F of fi lm, said plate 25 also having a pair of pro ections 27 spaced to engage the edges of said strip F, the pairs ofprojections 26 and I 27 corresponding with the projections 16 and 17 onthe plate 18. The plate 25 is hinged on the rod 20 by means of ears 28vwhich are adapted to slide along said rod 20. In initial position, theplate is disposed at the extreme right of the base 10 and is therespaced from the plate 14 a distance approximately equal to the width ofsaid plate 25. When the strip F is positioned on the plate 25 it isretained by means of a hinged leaf or plate having apertures 31 and 31'adapted to receive the projections 26 and 27 respectively, said leaf30being hinged on the rod 20 by means of ears'32 which permit it to beswung down into enagement with plate 25 and also to be movedongitudinally of the rod 20 toward and from the stationary holder.alsois supported by the bar 22 when in the inoperative positionindicated in Fig. 1.

When the strip F of film has been placed in operative position on theplate 14 and leaf 18 has been moved intooperative position as indicatedin Fig. 2, and when the strip F of film has been placed on the .plate 25and the leaf 30 has been swung down into engagement therewith, themovable holder formed by the plate 25 and leaf 30 will be elevatedsufiiciently to free a pair of uides 33 and 34 and will then be moved tot e left toward the stationary holder 14. When brought into thisposition the movable holder will be swung down into a position alongsidethe stationary holder as seen in F gure 2 and will there be guided intotrimmmg position by means of the guides 33 and 34 whlch are transverselydisposed on work table 13, said guides being so positioned as to msureproper trimming engagement between the arts.

T e trimming operation is performed by cutting edges provided on theparts of the holders. Referring to Fi ure 3 articularly, it will benoted that t e swinglng leaf 18 of the stationary holder is somewhatnarrower than the base plate 14 thus providing aledge 35 as a part ofthe late 14, while the hmged leaf 30 of the mova le holder is somewhatwider than the plate 25 thereof thereby formin a ledge 36 as a part ofthe leaf 39, which edge 30 overhangs ledge 35. The right edge 14' of thestationary plate 14 is formed as a cutting edge which cooperates with acutting edge 25 on, the plate 25,

The leaf 30 while the left edge of the hinged leaf 30 of the movableholder is provided with a cutting edge 30 which .cooperates with a cutting edge 37 carried by a strip 38 secured on the upper side of thehinged leaf 18. Thus, when the movable holder formed by the plate 25 andleaf 30 is swung down into position alon side the stationary holder thewaste ends 0 the film strips F and F will be sheared by the cuttingedges above described, proper shearing action being insured byengagement of the" parts of the movable holder with the guides 33. and34, and by engagement of the projections 16, 17, 2'6 and 27 in theapertures 24, 24', 31 and 31.- The table 13 may be pocketed at 40 toreceive the trimmings.

When the shearingFoperation is completed the two film strips and F areproperly aligned for a joint-forming operation. Inasmuch as themovements of the movable holder 25,30 are guided by the rod or pintle20, said holder may be lifted to separate the overlapped parts of thefilm sections for the purpose of abrading the same and for ap licationofcement thereto without disturbmg the conditions of alignment. Themovable holder and its film section F is then moved to its initialposition and spaced from the stationary holder as shown in Fig. 4 thusexposing the end marglnof the film section F 'on the ledge 35 to permitabrading the upper surface thereof. Abrasion of the film section iseffected by means of an abrading tool 41 embodyin a plate 42 having aserrated or toothed ower edge 43 affording a rasped surface, which plateis secured by a screw 44 to a bracket 45 aifixed by a pin 46 to alongitudinally slidable guide rod 47 sup-' ported in bearings 48 and 49carried by the swin 'ng leaf 18; theguide rod 47 extending LOO para lelto the cuttinged e 37 on the leaf 18 and spaced rearward y t erefrom.The rod 47 is turnable on its bearings and thebracket 45 is of suchlength that the plate 42 may be positioned to extend alongslde the edgeof the leaf 18 with the rasped surface 43 thereon disposed to engage theupper surface of.

the film section F so that on manually reclprocating the plate 42 thefilm section will be subjected to an abrading action. Wound on .the rod47 is a coil sprin 50 one end of disposed out of its operative positionclear of i the edge of the swmgm leaf 18 to permit the ready positioningof t e film section F in the stationary holder and the accomplishitsnormal position shown in ig ment of the cutting action as beforedescribed. The spring 50, however, permits abrading device in workingthe surface of the film acts to assist in retracting the abradingdevice. After thus abradin the film the abrading device is automaticalrestored to 2 by the spring 50. The movable holder and its film sectionF may then be returned to the position indicated in Figure 2, saidmovable holder being guided by the parts 33 and 34 into thepositionoccupied during the-trimming operation and the overlapped portions ofthe film sections bein pressed to ether between the ledges 35 and 36 forthe ormation of the joint.

Inasmuch as the images on the two sections F and F of film may beproperly spaced by reason of the PIOjGCtlODS 16 and 26, an alignment'ofthe two sections is determined bymeans of the projections 17 and 27,this relation will .be maintained throu 'h-' out all the operations ofthe device so t at the resulting joint will secure the sections of filmin perfect alignment with the images properly spaced as in a singlelength of fi m.

- I claim 1. In a film splicer, a hinged leaf, means whereby a filmsection may be clamped by p said leaf with the end portion thereofprogecting beyond one edge of the leaf, a 'de ar mounted for turnableand longitu 'nal movement on said leaf, and an abrading device carriedby said bar adapted to be positioned to engage the surface of the filmsection projecting beyond the edge of the leaf, and a spring acting onsaid abrading device to normally hold it both longitudinally andlaterally from the edge and end, respectively of the clam ed filmsection.

2. In a splicer, a plate adapted to support, a film section, a hingedleaf adapted to clamp said film section while the latter is'supportedupon said plate, the width of said plate being suflicient to provide aledge whercon a portion of the film section may be exposed when clampedby said leaf, an abrading device adapted to abrade the exposed portionof the film under the aboverecited condition, a guide carried by saidplate, said abrading device being mounted upon said guide to havethereon a sliding and also a rocking or turning movement, and a spiralspring which tends both to retract said a-brading device and to rock itout'of engagement with the ex osed portion of the film when the latteris c amped between said plate and leaf.

In testimony whereof I have aflixed my signature.

HAROLD ROHRDANZ.

